Primary gastrointestinal extranodal marginal zone lymphoma of mucosa associated lymphoid tissue (MALT) is more likely to occur in stomach, and may also in esophagus, small intestine, colon and rectum. But primary small intestinal MALT lymphoma is relatively rare, lack of specific clinical manifestations and easily to be misdiagnosed. This paper reports a case of primary small intestinal MALT lymphoma with intestinal obstruction as initial symptom and segmental ulcerative lesion, providing reference for clinical diagnosis and treatment.

Primary gastrointestinal extranodal marginal zone lymphoma of mucosa associated lymphoid tissue (MALT) is more likely to occur in stomach, and may also in esophagus, small intestine, colon and rectum. But primary small intestinal MALT lymphoma is relatively rare, lack of specific clinical manifestations and easily to be misdiagnosed. This paper reports a case of primary small intestinal MALT lymphoma with intestinal obstruction as initial symptom and segmental ulcerative lesion, providing reference for clinical diagnosis and treatment.